| Acronym | Definition |
|---|
| MTAA➣Motor Trades Association of Australia |
| MTAA➣Medical Technology Association of Australia (North Sydney, New South Wales, Australia) |
| MTAA➣Metropolitan Topeka Airport Authority (Kansas) |
| MTAA➣Merthyr Tydfil Angling Association (Wales, UK) |
| MTAA➣Massage Therapists Association of Alberta (Canada) |
| MTAA➣Melanoma Tumor Associated Antigen (medicine) |